4500 E 121st Ct, Thornton, CO 80241 Property Records

Adams County property record for 4500 E 121st Ct, Thornton, CO 80241 · Last verified February 2026

Property Highlights

Property Type	Residential > Single Family > Home
Bedrooms	4 Beds
Bathrooms	3 Baths
Year Built	Built 1979
Square Footage	1,979 sqft Living Area
Lot Size	10,019 sqft (0.23 acres)
Occupancy	Owner Occupied
Last Sale	$173,500 (1999)
Tax Bill	$1,091.00 (2025)

Property Details

APN / Parcel Number

Primary APN	`R0011700`
Alternative APNs	`0157131320001` `157131320001`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Plumbing Fixtures	11 Plumbing Fixtures
Total Rooms	7 Rooms
Building Area	1,979 sqft Living Area
1st Floor	1,031 sqft 1st Floor
2nd Floor	948 sqft 2nd Floor
Basement Area	576 sqft Basement
Finished Basement	201 sqft Finished
Stories	2 Stories
Interior Structure	Wallboard/Drywall Interior Structure
Fireplace	Fireplace
Fireplaces	1 Fireplaces

Exterior

Year Built	Built 1979
Architectural Style	Split Level Style
Exterior Material	Aluminum/Vinyl Exterior
Construction Type	Frame Construction
Foundation Type	Concrete Foundation
Roof Construction	Gable Roof Construction
Roof Material	Composition Shingle Roof
Lot Area	10,019 sqft (0.23 acres)
Depth X Width	128 ft x 77 ft Depth x Width
Parking Spaces	2 Parking Spaces
Garage Type	Attached Garage
Garage Area	585 sqft Garage

Utilities and HVAC

Cooling System	Central Cooling
Heating System	Forced Air Heating

Location & Zoning

Account Number	R0011700
Old Parcel Number	157131320001
Street Address	4500 E 121ST CT
City	THORNTON
State	CO
Zip	80241-3649
Property Usage	Residential Property Usage
Type	Residential > Single Family > Home
Legal Description	SUB:NORTHAVEN BLK:2 LOT:9
Legal Range	67W
Legal Township	01S
Legal Section	31
Legal Quarter	NE
Legal Subdivision	NORTHAVEN
Legal Block	2
Legal Lot Number	9
Jurisdiction	ADAMS CO
Minor Civil Division	WEST ADAMS
Census Blockgroup	2
Census Block	2005
Census Tract	8547

Owner

Source: Adams County records · APN R0011700

Assessment roll updated August 25, 2025 · Last verified February 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Individuals Owners
Mailing Address	4500 E 121ST CT, THORNTON, CO 80241-3649
Occupancy	Owner Occupied

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Known Transactions	Last Sale Amount on Apr 01, 1999 Deed Sale Price on Apr 01, 1999
Deed Doc Number	00523368
Deed Book / Page	5701 / 194
Record Refreshed	Jun 08, 2026

March 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ADAMS CO
Property Address	4500 E 121ST CT, THORNTON, CO 80241-3649
Document Number	0000019267
Instrument Date	Mar 09, 2019
Transaction Type	Mortgage
Record Updated	Mar 27, 2019
Title Company	NOT AVAILABLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4500 E 121ST CT THORNTON CO 802413649, THORNTON, CO 80241-3649

Mortgage

Document Number	0000019267
Date	Mar 18, 2019
Instrument	19267

Lender

Name	BELLCO CU
Type	Credit Union
Address	GREENWOOD, CO 80111

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	240 Months
Due	Mar 17, 2039

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

Source: Adams County records · Assessment roll updated August 25, 2025 · Last verified February 2026

Property Jurisdictions

Type	Name
State	Colorado
County	Adams County
Municipality	Thornton City
Unified School District	Adams 12 Five Star Schools (PK - 12)

Tax Bill & Assessment History

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$1,091.00 (-74.2%)	$25,750 (-33.58%) Land $4,830 Building $20,920	$512,000 (-10.65%) Land $96,000 Building $416,000
2023	$4,229.00 (+13.14%)	$38,770 (+14.23%) Land $5,820 Building $32,950	$573,000 (+17.36%) Land $86,000 Building $487,000
2022	$3,738.00	$33,940 Land $11,960 Building $21,980	$488,233 Land $172,000 Building $316,233